... polyurethane color steel panel, widely used in house, freezing house,clean room,garage door, roof , wall, antifire, sound abosrbing etc ... .4.AdvantageLigh,fireproofing,not buring in the naked light,smoke-free,harmless,no dripping,widely temperature used(- ... :Lower heat conductivity, higher thermal efficiency Low density, light weight Foamed with CFC free materials, environment protectiveHermetic seal ...